What it is
Triethylhexanoin is a colorless to pale yellow liquid ester formed from glycerin and ethylhexanoic acid, making it a synthetic triglyceride. In sunscreens it acts as an emollient and solvent that delivers a light, non-sticky, non-greasy skin feel and improves the smoothness and spreadability of the formula. It can also serve as a carrier for other oil-soluble ingredients and helps support a comfortable, lightweight wear, which makes it common in fluid sunscreens and stick formats. It is a stable emollient that does not contribute fragrance or active sun protection.
Safety & warnings
The Cosmetic Ingredient Review panel has assessed triethylhexanoin and related triglycerides as safe for use in cosmetics, reporting it as essentially non-irritating on skin with no evidence of sensitization. It is described as well tolerated by most skin types, including sensitive skin, and has a low risk of irritation, which supports its use in gentle, fragrance-free formulas.
Origin & sourcing
It is fully synthetic, produced by esterifying glycerin (glycerol) with ethylhexanoic acid (2-ethylhexanoic acid) to form the triglyceride; it is not extracted from a plant or animal oil.
Questions everyone asks
Is triethylhexanoin a natural oil?
No. It is a synthetic triglyceride made by combining glycerin with ethylhexanoic acid. It behaves like a light cosmetic oil but is manufactured rather than pressed from a plant.
Will it feel greasy or heavy?
Generally no. It is valued specifically for a light, non-sticky, non-greasy feel and is used to make sunscreens spread smoothly and wear comfortably.
Is it suitable for sensitive skin?
It is considered well tolerated with a low risk of irritation and has been reviewed as safe for cosmetic use, so it is often found in gentle, fragrance-free sunscreens.